Volumetric lighting scene
Thank you for stating your question clearly.
You need to setup a world environment mist.
The rendered light volume in Cycles doesn´t work with (noise/volumes)on the light. It works with noise /volumes on the space (Enviroment) like in the real world.
Make a cube. Assign a shader to it. Edit the shader. Delete diffuse node, CTRL+Shift A, search for principled volume. Attach it to the Material output on the VOLUME input connector.
Shift+A, select NOISE. Plug that NOISE into the DENSITY connector of the principled volume shader.
Delete all lights in the scene.
Make the world from the world property tab: black color.
Drive your camera inside the box you previously created and that you´ve assigned the principled volume shader.
Inside that box and with the camera looking through, create a ppoint light. Give it energy of 100. And continue to drop it down by half on each render test: (50, 25, 12, 7, 3.5...etc)
Until your light energy is appropiate for the effect you´re looking for.

Thank you for your consideration to vote me as the answer by clicking to the left :the icon with a check mark and upvote this answer.

BFCT_Schiller